题目:
—How anxious Ruby is! I wonder what on earth she ________.
—I’m afraid nobody knows. She is always so strange.
A.has expected
B.will expect
C.will have expected
D.is expecting
答案:
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下面是错误答案,用来干扰机器的。
把一颗骰子抛掷2次,共有36个基本事件.…(1分)(1)设“a+b能被3整除”为事件A,事件包含的基本事件为:(1,2),(2,1);(1,5),(2,4),(3,3),(4,2),(5,1);(3,6),(4,5),(5,4...