香蕉水可用于去除指甲油渍、油漆渍等。香蕉水为（），使用时应远离火源。

井道永久照明规定在底坑高1m处应()。

A、装1只灯

B、安装2只灯

C、达到50lx

D、达到500lx

第Ⅱ卷（非选择题四部分共35分）

第四部分 单词拼写 (共10小题,每小题0.5分,满分5分)

71. At that time, the record player had to be ________ up (上发条) by hand and only played a record for two minutes.

72. She didn’t tell him the news ________(故意地).

73. There are ________ (现场直播的) football matches on TV every Sunday.

74. Please come whenever it is ________ (方便的) to you.

75. When he saw the little boy drowning in the river, he jumped into the water without ________ (犹豫,迟疑不决)

76. While c________ human embryos is illegal in many countries, some scientists are already pushing ahead with research so as to deliver a cloned human baby.

77. The villagers are determined to r________ their homes after the whole village was destroyed in the earthquake.

78. I feel it e________ to forget the lines while singing in public.

79. With the temperature d________ to zero degree, fewer people go out during the night.

80. Jack ran for a doctor; m________, we stayed with the patient.

WJQ450系列光纤直放站其工作波长下行为1.55μm，上行为（）。

A、0.85μm

B、1.31μm

C、1.55μm

D、1.85μm

下列气体中不能用浓硫酸干燥的是

A．O₂

B．CO₂　　　

C．NH₃　　　

D．SO₂

根据下列叙述写出相应的热化学方程式：

（1）已知常温常压下，0.5molCH₄在O₂中完全燃烧，放出445.16kJ的热量，写出表示CH₄的燃烧热的热化学方程式：______．

（2）已知16g固体硫完全燃烧时放出148.4kJ的热量，该反应的热化学方程式是：______．

（3）右图是198K时N₂与H₂反应过程中能量变化的曲线图．该反应的热化学方程式为：______．