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【单选题】
Paragraph 3 __________. 查看材料A.
What causes autism?
B.
How common is autism?
C.
Does autism occur together with other disabilities?
D.
What is Autism?
E.
What kinds of jobs can individuals with autism do?
F.
What is the difference between autism and mental retardation?
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【单选题】关于雄蕊类型说法错误的是( )。
A.
二强雄蕊:雄蕊四枚，其中两枚花丝长、两枚花丝短
B.
四强雄蕊:雄蕊六枚，其中四枚花丝长、两枚花丝短
C.
单体雄蕊:所有雄蕊花丝联合成一棒状，花药彼此相连
D.
二体雄蕊:雄蕊花丝联合并分成两束
E.
多体雄蕊:雄蕊的花丝联合成多束
【单选题】听力原文：W: Hi, John. M: Oh! Hi, Laura, What are you doing here? W: Uh, I'm usually here on weekends. It's my dad's shop. So you are looking for a bike? M: Yeah. Now that the weather is warming up, I thou...
A.
She's waiting for her father.
B.
She's having her bicycle repaired.
C.
She wanted to surprise John.
D.
She works there.
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