21.Here’s one of the best ways to protec

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问题选择题

21.Here’s one of the best ways to protect your skin—_____ too much sunshine.

A．not to absorb

B．not having absorbed

C．having not absorbed

D．don’t absorb

答案

答案：D

多项选择题

维护血管内外和细胞内外水平衡的主要因素是（）

A.血浆中碳酸氢盐浓度

B.血浆与组织液的晶体渗透压

C.血浆中Ca²⁺浓度

D.血浆中葡萄糖的浓度

E.血浆与组织液的胶体渗透压

选择题

_______achievement，last week’s ministerial meeting of the WTO here earned a low，though not failing，grade.

A．In terms of

B．In case of

C．As a result of

D．In face of