皮皮学，免费搜题
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【单选题】
中性红为弱碱性染料，对液泡系的染色有专一性，只将活细胞中的液泡系染成（ ）色，细胞核与细胞质完全不着色，因而液泡系颜色与周边背景颜色对比鲜明，易于识别观察。
A.
蓝色
B.
绿色
C.
橘红色
D.
樱桃红色
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【判断题】( )聚氯乙烯被广泛用于各种包装、容器,如食品保鲜膜等。
A.
正确
B.
错误
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【单选题】设 , 为任意非零向量,下列结论中正确的是( )
A.
.
B.
C.
D.
( 是 的夹角)
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【单选题】The river is too dirty _____.
A.
to swim in
B.
for swimmming
C.
swimming
D.
swim
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【单选题】The river is too dirty to _____.
A.
to swim in
B.
for swimmming
C.
swimming
D.
swim
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【单选题】______ such heavy pollution already, it may now be too late to clean up the river.
A.
Suffering
B.
Suffered
C.
To suffer
D.
Having suffered
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【单选题】—Look! There is a big river. Let's swim in it! —No, I think it's _______ dangerous. [     ]
A.
much too
B.
too much
C.
too many
D.
much more
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【单选题】I've opened a( n) with Barclay's Bank.
A.
count
B.
account
C.
bill
D.
counting
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【单选题】设 , 为任意非零向量,下列结论中正确的是( ).
A.
.
B.
C.
D.
( 是与 同方向的单位向量).
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【单选题】The river is too dirty ______.
A.
to swim in
B.
for swimming
C.
to swim
D.
for swimming in
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【单选题】This river is too wide for the swimmers _________.
A.
to swim
B.
to swim across
C.
to swim in
D.
swimming
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相关题目：
【判断题】( )聚氯乙烯被广泛用于各种包装、容器,如食品保鲜膜等。
A.
正确
B.
错误
查看完整题目与答案
【单选题】设 , 为任意非零向量,下列结论中正确的是( )
A.
.
B.
C.
D.
( 是 的夹角)
查看完整题目与答案
【单选题】The river is too dirty _____.
A.
to swim in
B.
for swimmming
C.
swimming
D.
swim
查看完整题目与答案
【单选题】The river is too dirty to _____.
A.
to swim in
B.
for swimmming
C.
swimming
D.
swim
查看完整题目与答案
【单选题】______ such heavy pollution already, it may now be too late to clean up the river.
A.
Suffering
B.
Suffered
C.
To suffer
D.
Having suffered
查看完整题目与答案
【单选题】—Look! There is a big river. Let's swim in it! —No, I think it's _______ dangerous. [     ]
A.
much too
B.
too much
C.
too many
D.
much more
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【单选题】I've opened a( n) with Barclay's Bank.
A.
count
B.
account
C.
bill
D.
counting
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【单选题】设 , 为任意非零向量,下列结论中正确的是( ).
A.
.
B.
C.
D.
( 是与 同方向的单位向量).
查看完整题目与答案
【单选题】The river is too dirty ______.
A.
to swim in
B.
for swimming
C.
to swim
D.
for swimming in
查看完整题目与答案
【单选题】This river is too wide for the swimmers _________.
A.
to swim
B.
to swim across
C.
to swim in
D.
swimming
查看完整题目与答案