孢子植物从（）植物开始才有胚的构造。_爱下问搜题

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问题填空题

孢子植物从（）植物开始才有胚的构造。

答案

参考答案：苔藓植物

完形填空

选用方框内的句子补全对话（5分）

A. How about tomorrow ? B. I’m sorry to hear that .
C. That sounds g

ood . E. can you play tennis with me ?
F. What’re you doing the day after tomorrow ?
G. When ? H. I’m really busy this week .

    Andy: Hi, Vince ?
Vince: Yeah, hi, Andy !
Andy: Vince, 小题1:?
Vince: Uh,小题2:?
Andy: Today .
Vince: Uh, no, sorry, I can’t. I have to see the doctor .
Andy: 小题3:?
Vince: Sorry, tomorrow I’m playing soccer .
Andy: Oh, well, 小题4:?
Vince: I have to babysit my sister .
Andy: Oh, I see .
Vince: I’m sorry, Andy. 小题5: !

填空题

如图所示的图象所对应的两个导体（1）电阻之比R₁∶R₂为________；（2）若两个导体中的电流相等（不为零）时，电压之比U₁∶U₂为_________；（3）若两个导体的电压相等（不为零）时，电流之比为_________.