Living with host families, ________ ther

题型:选择题

问题:

Living with host families, ________ there may be other college students, gives her the chance to learn more about the new culture.

A.on which

B.about which

C.in which

D.among which

考点:非限制性定语从句
题型:选择题

患者女性,31岁,闭经56天, * * 少量流血1天伴下腹部隐痛。超声显示:子宫增大,宫内可见25mm妊娠囊,囊内可见胚胎组织及卵黄囊,并可见节律胎心搏动。胎囊周围有少量不规则液性暗区。

3天后,因流血量增多,复查超声所见:子宫稍增大,宫腔内回声杂乱,宫颈管内可见21mm形态欠规则妊娠囊,囊内可见胚胎组织,但无胎心搏动。确切的超声诊断为()。

A.不全流产

B.难免流产

C.先兆流产

D.稽留流产

E.宫颈妊娠

题型:选择题

我国“神舟”七号载人飞船发射升空,进入预定轨道后绕地球自西向东做匀速圆周运动,每90min转一圈.航天员在轨道舱做了许多科学实验,着地前1.5m返回舱底座发动机开始向下喷气,使返回舱减速下降,实现软着陆,“神舟”七号航天实验圆满完成.下列关于“神舟”七号的说法正确的是(  )

A.航天员在24h内可以见到日出的次数应为16次

B.“神舟”七号的轨道高度小于地球同步卫星的轨道高度

C.“神舟”七号绕地球做匀速圆周运动的速度略大于第一宇宙速度

D.在着地前1.5m内宇航员处于失重状态

题型:选择题

下列哪一种抗体不属于抗核抗体谱()

A.抗磷脂抗体

B.抗单链DNA抗体

C.抗双链DNA抗体

D.抗RNP抗体

E.抗Jo-1抗体

题型:选择题

参保患者在门诊就医后因病情需要住院治疗,住院前门诊医疗费应()结算.

A、让医生开局证明后按住院待遇报销;

B、门诊刷医保卡;

C、将门诊费用变成急症费用按住院待遇;

D、将门诊医疗费放入住院费中统一结算。

题型:选择题

Electronic mail has become an extremely important and popular means of communication.
The convenience and efficiency of electronic mail are threatened by the extremely rapid growth in the volume of unsolicited commercial electronic mail. Unsolicited commercial electronic mail is currently estimated to account for over half of all electronic mail traffic, up from an estimated 7 percent in 2001, and the volume continues to rise. Most of these messages are fraudulent or deceptive in one or more respects.
The receipt of unsolicited commercial electronic mail may result in costs to recipients who cannot refuse to accept such mail and who incur costs for the storage of such mail, or for the time spent accessing, reviewing, and discarding such mail, or for both. The receipt of a large number of unwanted messages also decreases the convenience of electronic mail and creates a risk that wanted electronic mail messages, both commercial and noncommercial, will be lost, overlooked, or discarded amidst the larger volume of unwanted messages, thus reducing the reliability and usefulness of electronic mail to the recipient. Some commercial electronic mail contains material that many recipients may consider vulgar or pornographic in nature.
The growth in unsolicited commercial electronic mail imposes significant monetary costs on providers of Internet access services, businesses, and educational and nonprofit institutions that carry and receive such mail, as there is a finite volume of mail that such providers, businesses, and institutions can handle without further investment in infrastructure. Many senders of unsolicited commercial electronic mail purposefully disguise the source of such mail.
Many senders of unsolicited commercial electronic mail purposefully include misleading information in the messages’ subject lines in order to induce the recipients to view the messages. While some senders of commercial electronic mail messages provide simple and reliable ways for recipients to reject (or ’opt-out’ o0 receipt of commercial electronic mail from such senders in the future, other senders provide no such ’opt-out’ mechanism, or refuse to honor the requests of recipients not to receive electronic mail from such senders in the future, or both.
Many senders of bulk unsolicited commercial electronic mail use computer programs to gather large numbers of electronic mail addresses on an automated basis from Internet websites or online services where users must post their addresses in order to make full use of the website or service.
The problems associated with the rapid growth and abuse of unsolicited commercial electronic mail cannot be solved by the government alone. The development and adoption of technological approaches and the pursuit of cooperative efforts with other countries will be necessary as well.

The unwanted e-mail problem can be solved if ______.

A.the government takes action

B.a new technology is adopted

C.more people are aware of the problem

D.joint efforts are made and new technology is used

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