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【单选题】
某农科所种植的甲、水稻，连续六年在面积相等的两块稻作对比试验，试验得出平均产量是 . x 甲 = . x 乙 =415㎏，方差是 s 2甲 =794， s 2乙 =958，那么这两个水稻品种中产量比较稳定的是（ ）A.
甲
B.
乙
C.
甲、乙一样稳定
D.
无法确定
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举一反三
【单选题】Joe Jones, the eldest of the eight children, had to ________ out of high school at the age of 16 to help his father on the farm.
A.
leave
B.
drop
C.
fall
D.
go
【单选题】We students are so busy with our homework that we have no time for outdoor exercise, ______ we have the desire.
A.
wherever
B.
whenever
C.
even if
D.
as if
【简答题】We are not _f______ ，but very busy now．
【简答题】供食用的新鲜的猪五花肉(猪腹部的肉),不带骨头
【单选题】We______ you more help then, but we were so busy at that time.
A.
ought to have given
B.
musthave given
C.
might havegiven
D.
need have given
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