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问题 多项选择题

关于康明斯ISL8.9E5发动机的油门踏板，下列描述正确的有（）

A、该发动机要求使用双模拟油门踏板

B、该发动机要求使用双数字油门踏板

C、油门踏板使用2个霍尔效应式传感器

D、油门踏板使用2个滑动电阻式传感器

答案

参考答案：A, C

单项选择题

根据我国《信托法》的规定，除信托文件另有规定的外，受益人自何时起享受信托受益权：( )。

A．信托生效之日起

B．委托人死亡之日

C．受托人死亡之日

D．信托合同签订之日
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填空题


Throughout history has (1) changed his physical environment in order to improve his (2) of life. With the tools of technology he has (3) many physical features of the earth. He has (4) woodlands and prairies into farms and made lakes and reservoirs (5) of rivers for irrigation purposes or hydroelectric (6) . Man has also modified the face of the earth by (7) marshes and cutting through mountains to (8) roads and railways.
However, man’s (9) to the physical environment have not always had beneficial results. Today, (10) of the air and water is an increasing danger to the health of the (11) . Each day thousands of tons of gases come out of the exhausts of motor vehicles. (12) from factories pollutes the air of industrialized areas and the surrounding (13) of the countryside. The pollution of water is equally harmful. The whole ecological (14) of the sea is being changed and (15) wastes have already made many rivers lifeless.
Now (16) protection is more pressing than ever before. As we know, massive destruction of the environment has brought about (17) effects and even poses a great (18) to man’s existence. Indifference to these problems will mean committing suicide. Therefore, effective (19) should be taken and laws passed to (20) the environment. Otherwise, man is certain to suffer from the serious consequences caused by this lack of care for his living surroundings.
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