蛔虫的消化器官不同于涡虫的特点是 A．有口无肛门 B．有口_爱下问搜题

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问题选择题

蛔虫的消化器官不同于涡虫的特点是

A．有口无肛门

B．有口有肛门

C．有小肠大肠

D．无口有肛门

答案

答案：B

题目分析：扁形动物的主要特征：身体背腹扁平、左右对称（两侧对称）、体壁具有三胚层、有梯状神经系统、无体腔有口无肛门，线形动物：身体细长，体壁有角质层，有假体腔，有口有肛门，假体腔的出现，为体内器官的发展提供了空间，因此线形动物表现出比扁形动物高等的特征是有原体腔、出现了肛门。

完形填空

A black car rushed around the busy street corner, towards the courthouse. The dark       window rolled down and a semi-automatic       stuck out.
Pauly Gillespie, a government protected witness (目击者), stood      , seeing death walking toward him. Pauly’s FBI bodyguards       themselves on top of him, but two     were fired and Pauly was hit       the shoulder.
The car       across two lanes (车道) of traffic. Then it turned left down a path and got __   behind a large truck. The two men in the car       out and raced away ---      into the arms of four policemen.
Special agent (特工) Brown was new to the police unit and was told to    __ the car out of the path so that the traffic could return to      . Brown changed the position of the rearview (后视) mirror     _ and drove it around to    __ his boss was questioning the two men.
Brown stood and watched. One of the men was tall and thin, and     _ was five inches shorter, about Brown’s      .
Agent Fordney asked the two men who had done the shooting. They    __ to tell him. Then Brown smiled and said, “I know who the shooter was.” His boss was surprised. How could Brown know that without getting any answer from the two men?
When Brown got into the car, he had to adjust the rearview mirror. That meant the previous driver had been of a       height. Since the shorter man was close to Brown’s height, he knew the taller man must have been the     _. Therefore, the shorter man had done the      .

A．driver-side

B．passenger-side

C．right-hand side

D．left-hand side

D．immediately

多项选择题

关于外环功控，下列哪些说明是正确的？（）

A.外环功率控制算法分为周期性算法和事件触发算法。

B.外环功率控制算法能有效地保证用户的bler逼近blertarget；

C.RNC的外环功率控制调整的是下行的sirtarget。

D.外环功控的目标值BLERTarget可以在后台配置。