When planting these trees,_not to damage the roots（）
A. care must be taken
B. care should be taken
C. you must take care
D. you can
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Which of the following choices best explain what the underlined “which” in the following sentence refers to？I accidentally fell into the company of half a dozen gentlemen, who were engaged in a warm d
A. The gentlemen
B. The political affair
C. The warm dispute
D. The gentlemen’s sentiments
Which of the following choices is grammatically similar to the underlined part of the following sentence？Did these prejudices prevail only among the meanest and lowest of the people, perhaps they migh
A. Did they prejudice against the black candidate during the election
B. Had I known the killer escaped, I would not have gone for a walk in the woods
C. Even if we did prevail, the legal fees probably would exceed the damages we might reasonably expect to recover
D. They did prevail, and they were immediately ready to reap the benefits of that victory
The presence of clathrin mediates vesicular transport（）
A. from ER to cis-Golgi
B. trans-Golgi to endosome
C. nuclear membrane to endosome
D. plasma membrane to trans-Golgi
Classes of membrane transport proteins include all of the following except（）
ATP-powered pumps
B. ion channels
C. protein translocons
D. transporters
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