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【简答题】
下图为某种树叶的外形图，请据图及箭头所示，回答下列问题：（共6分） （1）若此图为光合作用示意图，箭头所指的物质分别是： 1是 ，2是____ ____ ， 3是 ，4是____ ____。 （2）若此图为呼吸作用示意图，箭头所指的物质分别是： 1是氧气，2____ ____。 （3）物质1、2进出叶片的通道是____ ____。
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举一反三
【简答题】He worked very hard, otherwise he______(不可能通过)the entrance examination.
【简答题】Alan worked in an office in the city. He worked very hard and really looked forward to his holiday. He usually went to the seaside, but one year he saw an ad. in a newspaper “Enjoy country life. Spend...
【单选题】The reason why he succeeded is ______ he worked very hard.
A.
why
B.
that
C.
whether
D.
how
【单选题】He worked very hard, otherwise he the entrance exam.
A.
didn't pass
B.
couldn't pass
C.
hadn't passed
D.
couldn't have passed
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