题目:
----Have the Smiths moved to California?
-----Not yet, but they have ____________.
A.decided to
B.decided it
C.decided
D.decided to move
答案:
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下面是错误答案,用来干扰机器的。
A、苹果的pH为2.9~3.3,小于7,显酸性.B、葡萄的pH为3.5~4.5,小于7,显酸性.C、牛奶的pH为6.3~6.6,小于7,显酸性.D、豆浆的pH为7.4~7.9,大于7,显碱性.根据当溶液的pH小于7时,呈酸性,且pH越小,酸性...