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【单选题】
下列关于物质跨膜运输的叙述，错误的是 [ ]A.
细胞膜、核膜等生物膜都是选择透过性膜
B.
细胞对离子的吸收具有选择性，小分子物质和离子都是通过自由扩散进入细胞，大分子物质只能通过主动运输进入细胞
C.
海水中的海藻细胞可通过积累溶质防止质壁分离
D.
植物细胞积累K + 与分泌蛋白的分泌均需消耗能量
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【简答题】College Life American college and university students who (1) ________ away from their families are generally housed in (2) ________ at least for their first year. Men and women often live in the same...
【简答题】College Life [00:56.02]American college and university students who ——1——away from their families [01:02.15]are generally housed in ——2—— at least for their first year. [01:06.76]Men and women often l...
【简答题】女士求职面试服装以（ ）为宜。
【判断题】College dorms in America usually have common rooms, which are used by students to study or hang out with their friends.
A.
正确
B.
错误
【多选题】Which of the following elements are the primary differences between the U.S.and the U.K.systems of higher education?
A.
length of time
B.
ranking of universities
C.
academic term
D.
university organization
【单选题】Gallaudet University currently does not allow students to keep pets in their dorm rooms. Exceptions are made only for service animals such as guide 【C1】______ and hearing dogs. These working dogs prov...
A.
aids
B.
tests
C.
people
D.
does
【单选题】In the early days of nuclear power, the United States make money on it. But today opponents (反对者 ) have so complicated its development that no nuclear plants have been ordered or built here in 12 year...
A.
he inefficiency of the Nuclear Regulation Commission.
B.
The enormous cost of construction and operation.
C.
The length of time it takes to make investigations.
D.
The objection of the opponents of nuclear power.
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