苔藓植物具()。A.假根B.既有真根又有假根C.真根D.既有真根又有鳞片

题型:单项选择题

问题:

苔藓植物具()。

A.假根

B.既有真根又有假根

C.真根

D.既有真根又有鳞片

考点:农学植物学综合试题植物学综合试题题库
题型:单项选择题

测试人员、SQA单位是()专职人员。

题型:单项选择题
已知等差数列{an}的首项为a,公差为b,且不等式log2(ax2-3x+6)>2的解集为{x|x<1或x>b}.
(Ⅰ)求数列{an}的通项公式及前n项和Sn公式;
(Ⅱ)求数列{
1
anan+1
}的前n项和Tn
题型:单项选择题

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop"

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) She had only one small, flat bag with a few candies—fiftycent candies I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

10()。

A.shopping 

B.travelling 

C.parties 

D.greetings

题型:单项选择题

下面不属于《合同法》规定的要约邀请行为的是

A.寄送价目表

B.拍卖公告

C.招股说明书

D.悬赏广告

题型:单项选择题

何谓韦伯氏器?它有何功能?

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