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【单选题】
关于正常菌群的描述,正确的是A.
一般情况下,正常菌群对人体无害
B.
肠道内的痢疾志贺菌可产生碱性物质拮抗其他细菌
C.
口腔中正常菌群主要是需氧菌
D.
健康胎儿也携带正常菌群
E.
在人的一生中,正常菌群的种类和数量保持稳定
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【单选题】With economy getting worse，we have reached the point________we have to cut down our daily expenses.
A.
that
B.
which
C.
when
D.
where
【单选题】“千里之堤溃于蚁穴”这句话说明: ( )
A.
即使再小的偏差也要控制；
B.
对于会造成巨大损失的工作必须进行前馈控制；
C.
说明控制必须要加强衡量频度；
D.
对工作要全面控制；
【简答题】Translation: The more we control our own fate, the more we expect to control it. The more we have, the more we want to have!
【简答题】下列图片中楼梯类型是()
【简答题】下列图片中楼梯类型是()
【单选题】We have to subject the redesigned car seat to the test to officially confirm that it is_______strong.
A.
sufficient
B.
sufficiently
C.
more sufficient
D.
most sufficient
【单选题】听力原文：M: Susan, just check the map and see how far we have to 20 before we get to the town. W: I think we'll have to go another twenty miles. Our speed is now 40 miles per hour, so we'll get there pret...
A.
In about 40 minutes.
B.
In about 30 minutes.
C.
In about 20 minutes.
D.
In about 10 minutes.
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