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【单选题】
下面有关晶体的叙述中，正确的是（ ）A.
分子晶体中一定存在共价键
B.
在氯化钠晶体中每个Na + （或Cl - ）周围都紧邻8个Cl - （Na + ）
C.
离子晶体在熔化时，离子键被破坏，而分子晶体熔化时，化学键不被破坏
D.
熔融状态下导电的晶体一定是金属晶体
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举一反三
【单选题】I was told ______Bill Gates was thir he began to play with computers.
A.
that how
B.
how that
C.
when that
D.
that when
【判断题】分析失败原因,10%的大学生创业失败者将其归结于创业初期过于理想化,没有对创业项目进行细致思考和可行性分析,缺少对创业长远性的整体规划,缺少创业战略管理。
A.
正确
B.
错误
【单选题】—When did he start playing basketball ? —He began to play ________, and became famous ________. [ ]
A.
in the 1990s, in his twenties
B.
in 1990, in his twenty
C.
in 1990s, in the twenties
D.
in the 1990's, in his twenty
【简答题】The pianist waited for silence a while _______ he began to play the violin. A．until B．when C．after D．before
【单选题】Two years later, he began shaping his adventures into a stage play. What of the following one is not the meaning of "shaping" ?
A.
Two years later, he began adapting his adventures into a stage play.
B.
Two years later, he began changing his adventures into a stage play.
C.
Two years later, he began rewriting his adventures into a stage play.
D.
Two years later, he began reforming his adventures into a stage play.
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