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【单选题】
关于透明带的描述,下列哪项错误 ?A.
仅由卵母细胞分泌形成
B.
是一层嗜酸性的均质状膜
C.
位于卵母细胞和卵泡细胞之间
D.
从初级卵泡开始出现
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【简答题】（ ）是对企业人员总量、构成、流动的整体规划。
【单选题】It was _____ she took off her dark glasses _____ she was a famous film star. [ ]
A.
when, that didn't realize
B.
not until, that I realized
C.
not when, when I realized
D.
until, that I didn't realize
【单选题】But we can’t head back when it ______ dark, right?
A.
got
B.
gets
C.
getting
D.
is getting
【单选题】'How dark your brother's hair is!''It's ________ mine when I was at his age.'
A.
no darker than
B.
no more darker as
C.
not dark more than
D.
not darker as ~
【简答题】阅读理解 It was a dark and cold night. The taxi driver didn't have even one passenger all day. When he went by the railway station, he saw a young man coming out with two bags in his hands . So he quickly...
【单选题】It was not he took off his dark glasses I realized he was a famous singer.
A.
when; that
B.
until; that
C.
until; when
D.
when; then
【单选题】It was not _____ she took off dark glasses _____ I realized she was a famous film star. [ ]
A.
when; that
B.
until; that
C.
until; when
D.
when; when
【简答题】对称三相电源输出7.2kW功率给△连接的对称三相负载，负载阻抗为30+j40Ω，求负载的线电流、相电流与相电压。
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