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【单选题】
In which pair do the molecules have the same shape as each other?A.
H 2 O and CO 2
B.
H 2 O and SCl 2
C.
NH 3 and BH 3
D.
SCl 2 and BeCl 2
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皮皮学刷刷变学霸
举一反三
【简答题】根据中文提示或首写字母写单词（满分10分） 76．When I began to sing, he laughed and make me e _________． 77．I _________（宣布）at the meeting that I did not support him． 78．Flower arrangement is an __________（高雅的）art． 79．One o...
【简答题】选词填空: embarrass, embarrassed, embarrassing, embarrassment She was _____ by the question. This is an _____ question. When I began to sing, their laughter _____ me very much.
【多选题】生物活性最强的维生素D3是
A.
皮肤中7-脱氢胆固醇经紫外线照射转化而来的维生素D3
B.
自食物中摄取的维生素D3
C.
25-(OH)-D3
D.
1,25-(OH)2-D3
【单选题】生物活性最强的维生素D是
A.
25-（OH）D
B.
1，25（OH） 2 D
C.
24，25（OH） 2 D
D.
1，24，25-（OH） 3 D
E.
23，25（OH） 2 D
【单选题】We went to the West Lake yesterday, _______, not surprisingly, was crowded with visitors from all over the world． [ ]
A.
where
B.
which
C.
that
D.
when
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