潮汐周日不等(diurnal inequality of tide)的现象为()。A

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问题:

潮汐周日不等(diurnal inequality of tide)的现象为()。

A.一天有两次涨潮和两次落潮

B.相邻两次高潮或两次低潮潮高不等

C.涨落潮时间不相等

D.一天有两次高潮或两次低潮的潮高以及相邻的高、低潮的时间间隔不相等

考点:海船船员考试航海学(三副)航海学(三副)题库
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下列哪项不是进行性血胸的表现

A.血胸量达500~1000ml应剖胸探查
B.脉搏逐渐增快,血压持续下降
C.经翰血、输液后,血压不回升或升高后又迅速下降
D.胸腔闭式引流后,引流量连续3h超过200ml/h
E.胸腔穿刺因血液凝固抽不出血液,但连续胸部x线检查显示胸膜腔阴影增大

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Dear Jenny,
How’s it going? Are you busy with your study these days?
I’ve been back at school         nearly four weeks. I’m very glad to tell you that great        have taken place in our school this term. First of all, we’re asked to “clean our plates” when having our meals and say         to wasting. Some of us used to order more than what we could eat. That was a big waste of food. Now we need to        the food we order. We should also stop wasting in some other ways. For example, we should turn off the lights when we         the classroom. And our school has opened up some fields for us to learn how to grow vegetables. Each class is given a small garden and our class has decided to grow some tomatoes and beans (豆类) in our         time. I think that’ll be very interesting. Maybe I’ll be able to         you some beans we’ve grown by ourselves next time! What’s more, we have only two classes in the afternoon         we have more time for after school activities. I’m one of the traffic safety volunteers in our school. After school, we take turns to go to the streets near our school and ask people to       the traffic rules.
I think we are having a different school life now!
Please write back soon and tell ______ more about your school.
Yours,
Wang Wei
小题1:
A.inB.forC.onD.at
小题2:
A.changes B.thingsC.interestsD.lessons
小题3:
A.yesB.helloC.noD.thanks
小题4:
A.cleanB.payC.cookD.finish
小题5:
A.leaveB.reachC.openD.build
小题6:
A.busyB.freeC.happyD.sad
小题7:
A.plants B.buyC.postD.lend
小题8:
A.becauseB.whenC.beforeD.so
小题9:
A.followB.makeC.breakD.think
小题10:
A.himB.herC.youD.me
题型:单项选择题

简述冻害和寒害的表现。

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一种药物的毒性或副作用,能被另一种药物减轻或消除的配伍关系是()

A.相须

B.相使

C.相畏

D.相恶

E.相反

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三相异步电动机在运行中有铜损耕、铁损耗、机械损耗和附加损耗等功率损耗。()

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