调节阀按照动力源可分为气动、液动、电动。按阀芯动作形式分为单行程和双行程。

据《北京晚报》报道，2001年5月，阴天，气温约为-15℃，在新疆罗布泊沙漠沙丘上覆盖着约5cm～10cm的积雪，然而过了约20min雪不见了，而脚下却是干爽的沙地．这一现象使在场的科学考察队员很惊讶，请你用学过的物理知识回答下面的问题：

（1）请针对这个现象，提出你的猜想．猜想：______．

（2）简单分析和解释你的猜想．理由：______．

Do you know 3D movies? When you see one, it’s like the story is happening in front of you, and you are a part of it. 3D movies are amazing to watch, but do you know how to make them, and why you need to wear a pair of 3D glasses? To understand these questions, let’s do an easy experiment.

Put a finger in front of your eyes.

Cover your left eye and look at the finger.

Cover your right eye and look at the finger.

What do you see? The finger you see with your left eye is in a different position from the one you see with your right eye. This means you get two images(图像) when you look at something with both your eyes. To make a 3D movie, people have to get two images at the same time, so they use two video cameras. When playing a 3D movie, they use two projectors(放映机) at the same time. This brings two images together on the screen. Then, we use 3D glasses to separate(分离) the two images(1). One image enters one eye and the other image enters the other eye.

Then our brains put the two images together. This way, we get 3D pictures(2).

小题1:判断正误（“T”表示正确，“F”表示错误）You are a part of the story when you see 3D movies.

小题2:完成句子3D movies are exciting to watch, but you need to ____________________________.

小题3:简略回答问题 How do people get two images at the same time to make 3D movies?

_______________________________________________________________________

小题4:划线句子(1)提问_______________________________________________________________________

小题5:将文中划线句子(2)译成汉语。_______________________________________________________________________

患者主诉：一侧后牙冷热刺激痛已半年。查：7D龋洞，探敏，叩（-），冷测正常牙面反应同对照牙，进入龋洞时引起疼痛，去除刺激立即消失。

可能的治疗是（）

A.树脂充填

B.垫底，银汞充填

C.磨除法

D.药物治疗

E.再矿化治疗

今年4月11日，日本发生9级大地震，导致福岛第一核电站发生爆炸与核泄漏事故，引发了严重的核危机，此次核事故被日本原子能安全保安评估为“7级”．核辐射也称电离辐射，核爆炸和核事故都有核辐射．身体受到一定量的核辐射会致白细胞下降、致癌、致畸形，甚至导致死亡．核辐射主要有α、β、γ三种射线，这三种射线射入磁场或电场时，α、β射线会发生偏转，γ射线的方向不发生改变．这表明______射线是带电的粒子流，______射线是不带电的粒子流．

血吸虫的致病阶段不包括（）

A.尾蚴

B.胞蚴

C.童虫

D.成虫

E.虫卵