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【判断题】
火焰的颜色取决于燃烧物质的化学成分和氧化剂的供应强度。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】第五章课后编程题P136第1,3,4,7,10题共5道题。具体要求如下: 1.窗体和工程文件都要提交; 2.所有文件存放到一个文件夹内,压缩后提交压缩文件到附件。
【单选题】Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the ...
A.
Drink 2 glasses of water.
B.
Drink one glass of water.
C.
Drink half a glass of water.
D.
Drink no more water.
【单选题】Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the ...
A.
10:20.
B.
10:12.
C.
10:28.
D.
10:08.
【单选题】What is the author's main purpose in writing this article?
A.
To introduce the recent research on global wanning done by physiologists.
B.
To explain how plants, insects and microbes make humans sick.
C.
To warn people of the serious impact that the global warming will have on human health.
D.
To discuss the relation between climate change and life on earth.
【单选题】Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the ...
A.
He loves his present job.
B.
He is going to open a store.
C.
He is about to retire.
D.
He works in a repair shop.
【单选题】Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the ...
A.
She doesn't need a new roll of film yet.
B.
She still hasn't finished the first roll.
C.
She'll soon have two rolls to be developed.
D.
She'd like him to develop the first film for her now.
【单选题】用户编写了一个文本文件f.txt,想将该文件名称改为txt.f,下列命令______可以实现。
A.
cd f.txt xt.f
B.
echo f.txt > txt.f
C.
rm f.txt txt.f
D.
cat f.txt > txt.f
【单选题】Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the ...
A.
The job is not rewarding but challenging.
B.
The job is both challenging and rewarding.
C.
The job has both its strength and weakness.
D.
The job is hard work and the pay is not satisfactory.
【单选题】Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the ...
A.
She knows the guy who will give the lecture.
B.
She thinks the lecture might be informative.
C.
She wants to add something to her lecture.
D.
She'll finish her report this weekend.
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