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单项选择题

25岁第一胎，妊娠期母体呼吸系统的生理变化，错误的是（）

A.以腹式呼吸为主
B.呼吸次数每分钟不超过20次，但呼吸较深
C.肺活量无明显改变
D.孕妇易患上呼吸道感染
E.以胸式呼吸为主
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相关考题

单项选择题
Read the following passage. Choose the best answer.                              Extreme Sports
Some people say extreme sports are dangerous. However, it is reported that regular sports are not all that much safer than extreme ones. Whatever sports you do, if you are not afraid of getting hurt, your enjoyment will be greater. That is especially true for extreme sports. Here is an introduction to three new extreme sports.
Ostrich Racing
South Africa and Jacksonville, Florida, USA are the two homes of ostrich racing. Why do some guys like to practise this extreme sport? In ostrich racing you can see four or even ten ostriches marching forward at one time, and this is seriously strange. For the supporters, there’s a chance to ride an ostrich. Although if you don’t want to be bitten or kicked, you can use carts shaped like ostriches for racing instead.
BASE Jumping
BASE stands for several words—Buildings, Spans, Earth. Spans mean bridges and Earth means cliffs, but then the beauty of BASE jumping is that it’s just launching yourself from anywhere possible with a parachute ready to go. Although BASE jumping dates back to 1978, it has been increasingly popular recently due to Internet videos. Every jump presents a new possibility.
Bird Man Suits
The bird man suit has a few names—the flying squirrel suit, wing-suit and bat-suit. It’s a specially designed suit that lets you glide through the air at controlled speeds, adding a little extra to your usual skydiving experience. This is probably the closest we are going to get to flying. If combining this with BASE jumping, you’ll get some seriously death-defying feelings of excitement!
Which function does the bird man suit NOT possess?
A、It helps control flying speed.
B、It helps squirrels and bats fly.
C、 It helps people experience gliding through the air.
D、It can help people get seriously death-defying feelings of excitement.
多项选择题
人们通常所说的“三通一平”是指（）。
A.路通
B.水通
C.电通
D.空域通
E.场地平整
单项选择题
患者女，27岁。平时月经周期规律，现停经48天，近几天晨起恶心，呕吐，有尿频症状，诊断为（）
A.早期妊娠
B.急性肾小球肾炎
C.妊娠剧吐
D.继发性肝炎
E.妊娠合并病毒性肝炎
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