临边作业的回转式楼梯间应支设首层水平安全网,每隔( )设一道水平安全网。A.1层B

题型:单项选择题

问题:

临边作业的回转式楼梯间应支设首层水平安全网,每隔( )设一道水平安全网。

A.1层
B.2层
C.3层
D.4层

考点:安全员高处作业安全施工
题型:单项选择题

如图是肌肉与骨和关节的关系,请根据图示回答下列问题.

(1)请指出图中所标结构的名称:①是______,②是______.

(2)当伸肘时,图中的两块肌肉处于什么状态?______.

(3)当屈肘时,图中的两块肌肉处于什么状态?______.

题型:单项选择题

治疗肝火犯胃,呕吐吞酸,常以黄连配伍()。

A.丁香

B.干姜

C.花椒

D.小茴香

E.吴茱萸

题型:单项选择题

在植物细胞中,赖氨酸是由天冬氨酸衍生而来的,其合成受天冬氨酸激酶和二氢吡啶二羧酸合成酶的调控,这二酶又强烈地受到产物赖氨酸的抑制。为了在细胞中积累大量的赖氨酸,下列采取的措施最好的是()。

A.合成更多的天冬氨酸激酶和二氢吡啶二羧酸合成酶

B.阻断天冬氨酸激酶和二氢吡啶二羧酸合成酶的合成途径

C.克隆天冬氨酸激酶和二氢吡啶二羧酸合成酶对赖氨酸的抑制不敏感的基因

D.上述方法皆不可取

题型:单项选择题

Pharming is a scamming practice in which malicious code is installed on a personal computer or server, misdirecting users to (71) fraudulent Web sites without their knowledge or consent. Pharming has been called "phishing without a lure".

In phishing, the perpetrator sends out legitimate- (72) looking e-malls, appearing to come from some of the Web’s most popular sites, in an effort to obtain personal and financial information from individual recipients. But in pharming, larger numbers of computer users can be (73) victimized because it is not necessary to target individuals one by one and no conscious action is required on the part of the victim. In one form of pharming attack, code sent in an e-mail modifies local host files on a personal computer. The host files convert URLs into the number strings that the computer uses to access Web sites. A computer with a compromised host file will go to the fake Web site even if a user types in the correct Internet address or clicks on an affected (74) bookmark entry. Some spyware removal programs can correct the corruption, but it frequently recurs unless the user changes browsing. (75) habits,

(75)是()

A. habits signature

B. site

C. rages

D. address

题型:单项选择题

通过料层的风量与产量成()关系。

A、反比

B、正比

C、无关系

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