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【简答题】
用0，1，2，3，4，5这六个数字组成无重复数字的正整数． （1）共有多少个四位数？其中偶数有多少个？ （2）比4301大的四位数有多少个？ （3）能被3整除的四位数有多少个？ 注：以上结果均用数字作答．
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举一反三
【单选题】Take care not to get your shoes ______ in mud．
A.
wet or covered
B.
to be wet or covered
C.
to be wet or covered
D.
wet or be covered
【单选题】He gave copies of the report to all those present at the meeting, urging that they read and digest its content.
A.
hoping
B.
ordering
C.
insisting
D.
strongly advising
【单选题】你认为下列哪一现象最不可能在实验中发生（）
A.
用模拟样方法测定种群密度，两同学分别在一张50cm×50cm的白纸上制作方格表，将200粒绿豆种子随机撒在白纸上，选择5个方格计数，所计算出的种群密度不一样
B.
两同学在同一植株上剪取洋葱根尖后。立即进行“解离→漂洗→染色→制片”，将制成的装片放在同一台显微镜下观察，所观察到的图象不一样
C.
在同一块莱土上，各取1m 2 的土壤，两同学所调查到的生物种类和数量不一样
D.
两同学各取一支洁净试管，加入质量分数为2％的淀粉酶溶液，放入100℃的水浴中加热5min后，取出冷却，再倒入3%淀粉溶液，轻轻振荡混合液，放入60℃的水浴中加热10min，取出冷却后，滴入2滴碘液，并振荡试管，所观察到的颜色不一样
【简答题】My mom stared at me strangely while I 5 ( 涂满) makeup all over my face and neck.
【单选题】What will the man do before he leaves?
A.
Check out a chemistry book.
B.
Make copies of all the pages in the book.
C.
Put a notice on the bulletin beard.
D.
Look for a copy of the book on the reserve shelf.
【单选题】某电池符号为( - ) Pt│A 3+ , A 2+ ‖ B 4+ , B 3+ │Pt ( + ),则电池反应的 产物为 ( ) 。
A.
A 3+ ， B 4+
B.
A 3+ ， B 3+
C.
A 2+ ， B 4+
D.
A 2+ ， B 3+
【单选题】What will the man do before he leaves?
A.
Check out a chemistry book.
B.
Make copies of all the pages in the book.
C.
Put a notice on the bulletin board.
D.
Look for a copy of the book on the reserve shell'.
【单选题】He gave copies of the report to all those present at the meeting, ____ that they read and digest its content.
A.
hoping
B.
ordering
C.
insisting
D.
Urging
【单选题】He gave copies of the report to all those present at the meeting, ______ that they read and digest its contents.
A.
urge
B.
urging
C.
envy
D.
envying
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