M型超声心动图的二尖瓣水平波群可观察哪种结构的运动曲线 A．主动脉瓣曲线 B． * * 肌
题型：单项选择题
问题：
M型超声心动图的二尖瓣水平波群可观察哪种结构的运动曲线
A．主动脉瓣曲线
B． * * 肌曲线
C．主动脉根部曲线
D．肺动脉曲线
E．二尖瓣前叶、后叶曲线
题型：单项选择题
阅读短文，判断正“T”误“F”。
How to use the computer?
Today my father buys a computer for me. It has a keyboard, a monitor, a mouse and a printer.
I'm very happy because I can download some information from the Internet and print my homework.
Do you know how to use the computer? Let me tell you! First, switch on the computer. Then click
"new document". Next you can write what you want in the new document. When you write, you
should click "save" again and again.
Sometimes I like to have a travel to some beautiful places at weekends. I can check the train
timetable on the computer. I love the computer! What about you?
( )1. A computer has a keyboard, a monitor and a printer.
( )2. The writer knows how to use a computer.
( )3. The writer likes travelling.
( )4. The writer's mother buys her a computer.
( )5. The writer can use the computer to do her homework.