田间试验干扰因素多,试验误差是()避免的。 A.不可 B.可以 C.完全可以 D.能

题型:单项选择题

问题:

田间试验干扰因素多,试验误差是()避免的。

A.不可

B.可以

C.完全可以

D.能够

考点:农学农业推广学农业推广学题库
题型:单项选择题

以下关于肝叶切除术的管理错误的是()。

A.术中要注意出血问题,保证静脉通路

B.胸膜损伤后应注意反常呼吸及纵隔摆动

C.切除肿瘤时要注意搬动肝脏引起的下腔静脉压迫或扭折

D.麻醉术后即使呼吸循环尚未稳定也应及早气管拔管

E.肝静脉入下腔静脉处撕裂可发生气栓,应随时听心音

题型:单项选择题

在SQL语言中,GRANT和REVOKE语句的作用是维护数据库系统的 【9】 性。

题型:单项选择题

任务型阅读。

     阅读下面短文,请根据短文后的要求进行答题(请注意问题后的词数要求)。

      [1]Swimming is one of those activities that can be learned early

in life. Little children can learn to swim as soon as they walk. In fact,

you need the same skills in walking as in swimming. However,

believe that five is the best age to learn. By five or six, a child knows

fear of water,  a very important thing to know. It's wise to be afraid,

to recognize true danger. Young ones understand that the water can

sometimes be very dangerous.

    [2]To really benefit from swimming, every swimmer should

learn ____: butterfly,  backstroke,  breaststroke,  and crawl. I

feel that one of these-the breaststroke-is different from the

others, since some young swimmers use this stroke naturally,

without any training.

     [3]In swimming, there are certain rules every swimmer should

follow :

      (1) Never swim alone!  No matter how good you are in the

water, don't risk drowning by swimming alone. If you swim by

yourself, with no life guards or friends with you, you may get into

trouble.

    (2) Don't go beyond your abilities. Most swimmers know

enough not to swim too far from the bank or the beach Showing off

by doing dangerous tricks is no good. Swim safely and you will

continue to swim and alive.

      (3)Don't smoke. Swimming depends on a healthy body; good

lungs are part of Lt.

      (4)Work at any activity that builds muscles.

1.What is the main idea of the passage? (no more than 10 words)

______________________________________________________

2. Please complete the following statement with proper words. (nomore than 5 words)

   ________________________________ and the recognition of its danger are sensible.

3. Fill in the blank in Paragraph 2 with proper words. (no more than 7 words)

_________________________________________________________________

4.Why should not you swim alone according to the passage? ( no more than 10 words)

_________________________________________________________________

5. What does the underlined word "it" probably refer to? (no more than 3 words)

__________________________________________________________________

题型:单项选择题

石韦药材来源于()

A.蔷薇科

B.五加科

C.菊科

D.水龙骨科

E.十字花科

题型:单项选择题

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