沪宁高速公路上，一辆小轿车以108km/h的速度匀速行驶，司机突然_爱下问搜题

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问题问答题

沪宁高速公路上，一辆小轿车以108km/h的速度匀速行驶，司机突然发现前方有紧急情况，经过0.6s开始刹车，又经过4.4s滑行了52m，轿车才停止．求司机从发现情况到车停止这个过程中车的平均速度．

答案

0.6s汽车行驶的路程为s=vt=108km/h×

0.6

3600

h=0.018km=18m；

从发现情况到车停止的平均速度为：v_均=

s总

t总

=

18m+52m

0.6s+4.4s

=14m/s；

答：司机从发现情况到车停止这个过程中车的平均速度是14m/s．

听力题

第II卷（非选择题共35分）

第四部分：写作（共二节，满分35分）

第一节；单词拼写，每空限填一词（共10小题，每小题1分，满分10分）

76. The boy suddenly lost his b_______ and fell from the tall tree.

77. Wet weather may c_______ for 3 weeks.

78. Don’t b_______ your mother about it now; she is very tired.

79. They made a lot of scientific e_______ in this small dark room.

80. The food will d________ more quickly if you chew it well.

81. We totally _______ (敬佩) him for what he does.

82. Although you live in Taiwan, you should remember your ________(祖先) are Chinese.

83. She eagerly _______ (撕) the envelope open and read the letter.

84. The main _______(主题) of the meeting was to reduce the air pollution.

85. You don’t know how ________(宝贵的) your friendship is to me.

填空题

漂白粉在鱼病防治中主要是针对（）疾病（）