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搜题
【单选题】
可作为溶蚀性骨架片骨架材料的是A.
硬脂酸
B.
聚丙烯
C.
聚硅氧烷
D.
聚乙烯
E.
纤维素
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】试用真值表证明等式:
【单选题】— I promise my daughter ____ get a nice present on her birthday. — I think it will be a big surprise to her. [ ]
A.
must
B.
shall
C.
might
D.
need
【单选题】—I promise that she get a nice present on her birthday. —It will be a big surprise to her.
A.
should
B.
must
C.
would
D.
shall