随机误差是() A.有规律的 B.没有规律的 C.可预测的 D.可预防的

题型:单项选择题

问题:

随机误差是()

A.有规律的

B.没有规律的

C.可预测的

D.可预防的

考点:水利部质量检测员考试水利部质量检测员考试题库
题型:单项选择题

如图是家蚕的发育示意图,据图判断回答问题:

(1)家蚕的成虫是______和______,幼虫是______(填字母代号)

(2)家蚕的发育属于______发育,将上述各图按家蚕的生殖发育过程进行排序,______(填字母代号)

题型:单项选择题

An eight-year-old child heard her parents talking about her little brother. All she knew was that he was very sick and they had no money left. When she heard her daddy say to her (1) mother," (2) a miracle can save him now", the little girl went to her bedroom and took out her piggy bank. She (3) all the change out on the floor and counted it carefully. Then she (4) her way six blocks to the drugstore.

"And what do you want" asked the shopkeeper. "It’s (5) my little brother," the girl answered back. "He’s really, really sick and I want to buy a (6) . His name is Andrew and he has something (7) growing inside his head and my daddy says only a miracle can save him. " "We don’t (8) miracles here, child. I’m sorry." the chemist said, smiling (9) at the little girl.

In the shop was a (10) customer. He stooped down and asked the little girl, "What kind of miracle does your brother (11) " "I don’t know," she replied. "He’s really sick and mommy says he needs (12) . But my daddy can’t pay for it, so I have brought my (13) .""How much do you have" asked the man. "One dollar and eleven cents, (14) I can try and get some more," she answered quietly. "Well, what a coincidence," smiled the man. "A dollar and eleven cents—the (15) price of a miracle for little brothers. (16) me to where you live. I want to see your brother and (17) your parents. "

That well-dressed man was Dr Carlton Armp, a doctor. The operation was completed without any (18) and it wasn’t long before Andrew was (19) again. The little girl was happy. She knew exactly how much the miracle cost—one dollar and eleven cents—also the (20) of a little child.

15().

A.same

B.exact

C.proper

D.necessary

题型:单项选择题

画出图中杠杆的动力臂和阻力臂.

题型:单项选择题

善消面食积滞的是()。

A.鸡内金

B.莱菔子

C.山楂

D.麦芽

题型:单项选择题

以下哪一项不是金融衍生品的功能()。

A.规避市场风险

B.套利

C.投机

D.保本

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