皮皮学,免费搜题
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搜题
【多选题】
工艺危险性分析工具包括( )
A.
检查表
B.
危险及可操作性分析 (HAZOP)
C.
层保护分析(LOPA)
D.
故障树分析
拍照语音搜题,微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】Tom, turn down the music. Why _____ you make such a big noise while your baby sister is sleeping? [     ]
A.
must
B.
would
C.
should
D.
may
【单选题】—Tom, why don't you do your homework in your room? —I _____it already. [     ]
A.
did
B.
have done
C.
do
D.
will do
【单选题】Why does Jane refuse Tom's invitation?
A.
Because she wants to study for a test.
B.
Because she wants to go swimming at the student center.
C.
Because she has to do research in the library.
D.
Because she is not interested in the man.
【判断题】25℃时,0.1mol.L-1HAc的α= 1.33%,表示在该溶液中每10000个HAc分子有约133个 HAc分子解离成H+ 和Ac-
A.
正确
B.
错误
【单选题】Why,Tom, didn't you get your bike ? [     ]
A.
mend
B.
to mend
C.
mending
D.
mended
【单选题】在 50mL0.1 mol ·L -1 HAc溶液中加入等体积水稀释,对稀释后的水溶液而言,下列叙述正确的是 A B C D
A.
HAc 的解离度 α 减小,溶液的 pH 值减小
B.
HAc 的解离度 α 增大,溶液的 pH 值增大
C.
HAc 的解离度 α 增大,溶液的 pH 值减小
D.
HAc 的解离度 α 增大, HAc 的解离常数增大
【多选题】根据物理性状的不同,培养基可分为
A.
液体培养基
B.
半固体培养基
C.
固体培养基
D.
基础培养基
E.
营养培养基
【单选题】1mol·L -1 HAc,α HAc =1.33%,则在此溶液中微粒浓度最大的是
A.
H +
B.
Ac -
C.
OH -
D.
HAc
【单选题】Tom, turn down the music. Why ____ you make such a big noise while your baby sister is sleeping? [     ]
A.
could
B.
would
C.
should
D.
must
【单选题】1mol/lHAc 溶液中 HAc 的 α = 1.33%, 则 [H+] 为( ) mol/l.
A.
1.3 3×10 -3
B.
1.33×10 -2
C.
1.33×10 -1
D.
1.33
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