在某个经常刮大风的海岛上,有许多无翅或残翅昆虫.该岛上无翅或残翅昆虫特别多的原因

题型:选择题

问题:

在某个经常刮大风的海岛上,有许多无翅或残翅昆虫.该岛上无翅或残翅昆虫特别多的原因是(  )

A.自然选择的结果

B.长期不用的结果

C.定向变异的结果

D.人工选择的结果

考点:进化的原因
题型:选择题

For Sale
An iPhone 4, second-hand, 90% new, the price can be negotiated (协商) in person, call Coco at 757-6589
Looking to rent
One-bedroom apartment, from January 1st to April 30th, with bath and shower, near the dining hall of the university but not inside the university.
Call Charlie at 422-3895
Lost
Lost two days ago near Man Street. Puppy is only 8 months old. He is a black schnauzer. It is priceless for me. Reward. Call Salina at 633-7856
Found
A purple wallet was found on the street in Packard-Jewett area yesterday afternoon, Sept 22nd. Please call Jason at 909-8972.
小题1:You can get in touch with ________ if you want to buy an old cell phone.
A.ElaineB.CocoC.SalinaD.Jason
小题2:Charlie wishes to rent an apartment ___________.
A.which is near restaurantsB.which is in the university
C.which has a dining hallD.which he can take a shower in
小题3:From the last two advertisements, we know ___________.
A.the puppy has been missing for 8 months
B.the purple wallet was found on Sept 21st
C.Salina loves the puppy very much
D.Salina lived on Man Street
题型:选择题

会计传票交接登记簿:用于登记()每日会计传票的交接情况。

题型:选择题

酸浴中硫酸浓度过低易造成纤维内外层的再生程度不均一,内应力较高,物理机械性能较差。

题型:选择题

下列关于外国人出入我国国境和居留的说法,正确的是()。

A.外国旅游者人出中国国境应经过中国政府主管机关许可,持有效证件

B.外国旅游者的人身自由不受侵犯

C.外国人签证到期,可以继续在中国旅行

D.外国旅游者人出境要接受“一关四检”的检查制度

题型:选择题

双管采暖系统

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