钻井法施工中，减压钻进是指（），使得刀具在钻头旋转时可破碎岩石。 A.将钻头本身在泥

已知椭圆C的中心在原点，焦点在x轴上，以两个焦点和短轴的两个端点为顶点的圆边形是一个面积为8的正方形（记为Q）。

（1）求椭圆C的方程；

（2）设点P是椭圆C的左准线与x轴的交点，过点P的直线l与椭圆C相交于M，N两点，当线段MN的中点落在正方形Q内（包括边界）时，求直线l的斜率的取值范围。

森林古猿的一支演化为人类是

A．环境造成的

B．大自然的规律

C．人为因素造成的

D．主观意愿

When the system upon which a transport entity is running fails and subsequently restarts, the (1) information of all active connections is lost. The affected connections become half-open, as the side that did not fail does not yet realize the problem.

The still active side of a half-open connection can close the connection using a (2) timer. This timer measures the time the transport machine will continue to await an (3) of a transmitted segment after the segment has been retransmitted the maximum number of times. When the timer (4) , the transport entity assumes that either the other transport entity or the intervening network has failed. As a result, the timer closes the connection, and signals an abnormal close to the TS user.

In the event that a transport entity fails and quickly restarts, half-open connections can be terminated more quickly by the use of the RST segment. The failed side returns an RST i to every segment i that it receives. When the RST i reaches the other side, it must be checked for validity based on the (5) number i, as the RST could be in response to an old segment. If the reset is valid, the transport entity performs an abnormal termination.

2（）

A.give-up 

B.abandon 

C.quit 

D.connection

某电力工程包括机组及配套码头工程，热电厂主要是为石化生产设施提供蒸汽和电力。剩余电力则经过升压上网，售予电力公司。烟气经电除尘和脱硫后，通过烟囱排空。设备包括500t/h燃煤锅炉一座，150MW发电机组一台，年消耗煤炭150万吨，配套建设3.5万吨级多用途码头一座。同时配备设置低氮燃烧器，除氮效率为30%～55%，排放浓度＜410mg/m³，低于电厂排放标准450mg/m³；设置布袋式除尘器(日本产)除尘效率达99.7%，烟尘排放浓度低于50mg/m³；设置湿式洗涤脱硫系统，以脱除烟气中的SO₂，脱硫效率95%。
[问题]

对传感器的理想要求是（）。

A.传感器的输出信号须仅随被测参数变化而变化

B.传感器的输出信号与被测参数间为线性的单值函数

C.以上二条都满足