Something must be done to prevent our ci

题型:选择题

问题:

Something must be done to prevent our city ____ by thick smoke.

A.to be polluted

B.from polluting

C.from being polluted

D.polluting

考点:介词和介词短语
题型:选择题

具有凉血止血、清热利尿、清肺胃热功效的药物是()

A.大蓟

B.小蓟

C.白茅根

D.地榆

E.槐花

题型:选择题

She parked her car outside the window _______, but the next morning she found it missing. [ ]

A. as usual

B. at least

C. so far

D. at all

题型:选择题

胃痛兼见脾胃虚寒者,针灸治疗除取主穴外,还应加

A.关元

B.气海

C.梁门

D.胃俞

E.脾俞

题型:选择题

命题“x∈Z,使x2+2x+m≤0”的否定是( )。

A.x∈Z,使x2+2x+m>0
B.不存在x∈Z,使x2+2x+m>0
C.对x∈Z使x2+2x+m≤0
D.对x∈Z使x2+2x+m>0

题型:选择题

定位制动时,要在叉车前叉距目标()时,踩下制动踏板将车停住。

A、10cm

B、15cm

C、5cm

D、20cm

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