光滑水平面上的物体,在水平方向只受一对平衡力作用,则该物体( ) A.只能以一定

题型:选择题

问题:

光滑水平面上的物体,在水平方向只受一对平衡力作用,则该物体(  )

A.只能以一定的速度做匀速直线运动

B.只能沿一个力的方向做匀速直线运动

C.不是静止,就是沿力的方向做匀速直线运动

D.可能在水平面上向任意方向做匀速直线运动

考点:力与运动的关系
题型:选择题

It's very _____________ in summer in Nanjing.[ ]

A. cold 

B. cool

C. hot

题型:选择题

符合渗出液特点的是()。

A.淡黄色透明

B.比重小于1.018

C.细胞数低于500×106/L

D.黏蛋白定性试验(-)

E.放置后自凝

题型:选择题

患儿4岁,发热、咳嗽2天,昨天去某医院检查发现有心脏杂音,疑有心脏病。查体:发育、营养状态良好,胸骨左缘第3、4肋间有3级全收缩期杂音。心脏彩色二维多普勒超声显像,示室间隔有0.4cm大小回声失落,过膈征(+)。对此患者以下哪项处理为正确

A.需尽快手术矫治畸形

B.应严格限制活动

C.不能做预防注射

D.定期随诊观察

E.应用抗生素防治感染

题型:选择题

C


Jill lived with her grandma. The old woman was p enough that she could do everything herself at home.
As soon as Jill began to tidy the rooms or wash something, her grandma stopped her and told her to work hard at her lessons. Jill had to listen to her grandma and spent all her time on her study. So she went to college at last.
Now the girl has left college. She did well in all her subjects and easily found work in Mr. Brown’s company. She was sure Mr. Brown would put her in an important position(位置).
On the first day the boss gave her a broom and said, "Your first work is to sweep the offices. "
"What" the girl called out in surprise," I’m a college student, you know. "
"I’m sorry I don’t know that. Here, give me the broom and let me show you!\

As Jill’s grandma was p, ______.

A.the girl would live with her

B.she did all the housework

C.she kept doing morning exercise

D.she could help her with her lessons

题型:选择题

女性,32岁,足月妊娠剖宫产术后半年,不哺乳,月经已复潮,但周期不规则,平素经量多,有贫血史。首选的避孕方法为()

A.安全套

B.口服短效避孕药

C.输卵管绝育术

D.宫内节育器

E.安全期避孕

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