法律关系是一种思想关系，因为法律事实的产生以法律关系参加者的意志为转移。 ( )

Do you know what school life is like in Singapore? In Singapore, a class only lasts half an hour, but there are no rests between classes. The students only have a 30-minute tea break after 3 or 4 classes.

They do not do eye exercises. Yao Suyu, a Singaporean student said our eye exercise were new to her. “I’d like to introduce them to our school,” she said. “They’re very useful.”

In Singapore school ends at 1:30p.m. But students join other clubs after school, such as dancing clubs and singing clubs. Yao said she joined the dancing club twice a week and it lasted from 1: 50 to 5:30 p.m.

Its population includes Chinese, Indians, Malays and Westerners. But there is no school for any one of the groups. The students in Yao’s school are Chinese, Indians and Malays. “The Indian students take Indian language classes when we study Chinese,” said Yao, “but if an Indian student is interested in Chinese, he ore she can study it, too.”

In Singaporean schools, teachers teach in English. It’s the official（官方的）language in Singapore. Singaporean students have to take different courses after school. Like most Singaporean students, Yao takes other courses in Chinese，such as math and English.

小题1:判断正误（T，F）：A class lasts an hour in Singaporean schools.

小题2:完成句子：The students don’t do ____________ in Singapore.

小题3:完成句子：In Singapore school ends at __________.

小题4:简略回答问题：What does Singapore’s population in clude? ______________________________

小题5:找近义句：在文中找出并写下与下列句子意思相近的句子。

Singaporean teachers speak English in class.

___________________________________________

如图所示，直角坐标系的y轴左方为垂直纸面向里的匀强磁场，磁感应强度的大小为B；垂直x轴竖直放置一个足够大接收屏PQ，它离原点距离为og=L/2；直角坐标系的第一象限和第四象限的abco、ocdf均是边长为L的正方形，内各有一垂直纸面方向的半径为L的1/4圆形匀强磁场区域, 磁感应强度的大小均为B。bd为一线状发射装置，射出一束质量为m、电荷量为e的电子，以相同的初速度沿纸面垂直于bd边射入两个正方形区域，电子从bd边上的任意点入射，都只能从原点o射出进入y轴左方磁场。（不考虑电子之间的相互作用，不计重力）求

（1）第一象限和第四象限中匀强磁场区域的磁感应强度的方向

（2）电子沿纸面垂直于bd边射入初速度大小v₀

（3）电子打到接收屏PQ上的范围

（4）打在接收屏上的电子在磁场中运动的最长时间t

肺动脉里流的是静脉血，肺静脉里流的是动脉血．______．

变压器新安装后，应进行检查，并作（）次全压冲击合闸试验

A、3

B、4

C、5

D、6

关于降雨历时叙述不正确的是（）。

A．降雨历时是指某次降雨连续降雨的时段

B．降雨历时必定是某次降雨自始至终所经历的时间

C．降雨历时可以是降雨过程中个别连续时段

D．降雨历时单位常用min或h