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【单选题】
在生物园里种植出甲、花生,现对甲和乙果实的长轴长度进行抽样测量,结果如表。分析表中数据,以下叙述正确的是 ( ) 长轴(毫米) 18 20 22 24 26 28 30 32 34 36 样本甲数量 0 0 1 3 6 8 10 7 3 2 样本乙数量 3 7 9 11 5 2 2 1 0 0A.
甲果实的长轴长度都大于乙
B.
甲中长轴存在个体差异，这种差异不属于变异
C.
由数据推测甲、乙可能为两个不同品种
D.
甲、个样本间的差异主要是由环境引起的
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举一反三
【单选题】They took off their coats and went to the table near the window.
A.
off
B.
to
C.
near
【简答题】they took off their clothes and there were no more (9)___________.
【单选题】Two of the words have the same grammatical function in the sentence. One does NOT. Choose the letter (A, B or C) which does NOT have the same grammatical function. They took off their coats and went t...
A.
off
B.
to
C.
near
【单选题】As time went by, they found their efforts to help students ________. [ ]
A.
showed off
B.
took off
C.
put off
D.
paid off
【单选题】Two of the words have the same grammatical function in the sentence. one does Not. Choose the letter (A, B or C) which does Not have the same grammtical function. They took off their coats and went to...
A.
off
B.
to
C.
near
【简答题】A Science Fiction Story: The woman looked at a small (1)____unit on her arm. ‘It’s all right,’ she said to the man. ‘We can breathe the air ... it’s a mixture of oxygen and nitrogen.’ Both of them too...
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