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【简答题】
《普通高中化学课程标准》(2017年版)对化学学科的基本特征进行了描述,认为化学学科的基本特征是从微观层次认识物质、( )、( )。
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举一反三
【单选题】single choice：what's the meaning of this radical“田 tián”？
A.
strong
B.
pray，bless
C.
f ield
D.
grain
【单选题】Which of the following is TRUE according to the passage?
A.
One should not apply first aid to the injured without knowing the ease of the accident.
B.
It is easy to carry out first aid if one has the necessary facilities.
C.
First aid is an important part of the whole treatment.
D.
First aid may not be effective before a doctor or expert comes.
【单选题】Which of the following statements is NOT true?
A.
Aid workers were kidnapped from a refugee camp.
B.
One of aid workers may be injured.
C.
An extremist group has claimed responsibility.
D.
There is no demand for payment from the kidnappers.
【单选题】Relief work and selfless ______ aid continues, which helps deliver needed equipment to the disaster area.
A.
conventional
B.
unusual
C.
outstanding
D.
voluntary
【单选题】从地图上可以看到，非洲大陆就像一把斧头，将海洋狠狠砍开，在它两侧，一边是大西洋，一边是印度洋。非洲是的全称“阿非利加洲”在希腊语里意思是（）。
A.
遍地黄金
B.
人类起源
C.
大海之中
D.
阳光灼热
【单选题】—What's the matter with you? —I'm _______, I want some water to drink. [ ]
A.
thirsty
B.
hungry
C.
tired
D.
sleepy
【简答题】非洲全称阿非利加洲,“阿非利加”是“__”的意思。 地理位置:非洲位于__半球的西部,地跨__南北。非洲东濒__洋,西临__洋,北隔__海及__海峡与欧洲相望,东北与__洲之间隔着狭长的__海,并以__运河为陆上分界。
【单选题】留取24小时尿标本做17-羟类固醇检查,加入浓盐酸其主要目的是
A.
防止尿中激素被氧化
B.
防止细菌污染
C.
保持尿中的化学成分不变
D.
固定尿中有机成分
E.
固定尿中的有形成分
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