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【单选题】
温带草原里有鸟、昆虫、猫头鹰、鼠、蟾蜍和蛇等6种动物，它们相互间的关系是：①猫头鹰捕食蛇、鼠、鸟②昆虫、鸟及鼠以植物的各器官为食物③蟾蜍和鸟捕食昆虫④蛇吞食蟾蜍和鼠，下列说法错误的是（）
A.
该生态系统中有5条食物链
B.
占有2个或2个以上营养级的生物是鸟、蛇和猫头鹰
C.
昆虫数量减少不会导致猫头鹰数量产生明显变化
D.
蟾蜍和鼠之间具有竞争关系
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【判断题】When you are writing the date of a memo, you can write the month in abbreviated form.
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B.
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【单选题】Which of the following is NOT a point you should remember in writing a memo?
A.
Be rude to your reader
B.
Be concise
C.
Come to the point first
D.
Be coherent.
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【单选题】You are writing a memo to employees announcing the loss of free parking. Which of the following would be the best closing sentence in this bad-news memo to employees? ( )
A.
We understand your disappointment with this decision.
B.
If you would like to sign up for our ride-sharing program to save on parking expenses, please see the receptionist.
C.
We trust you will continue to do your best in spite of the present difficult situation.
D.
Thank you in advance for your cooperation.
查看完整题目与答案
【单选题】Which of the following is NOT a point you should remember in writing a memo?
A.
be rude to your reader
B.
be concise
C.
come to the point first
D.
be coherent
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【单选题】外面剂能使混凝土拌合物在不增加水泥用量的条件下，改善拌合物的和易性和黏聚性，降低（ ）。
A.
保水性
B.
泌水性
C.
耐久性
D.
流动性
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【判断题】理想电压源和理想电流源可以相互等效
A.
正确
B.
错误
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【判断题】理想电压源和理想电流源不可以相互等效替换。
A.
正确
B.
错误
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【单选题】Before you begin to write your first memo, it is important to understand the differences between writing memos and writing essays. A few of the most important distinctions appear in the table below. A...
A.
the importance of memo writing
B.
specific purpose of a memo
C.
a few important distinctions between memos and essays
D.
the importance of understanding the differences between writing memos and　writing essays
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【判断题】理想电压源和理想电流源之间也可以相互等效。
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B.
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【判断题】理想电压源与理想电流源之间可以互相等效。()
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【判断题】When you are writing the date of a memo, you can write the month in abbreviated form.
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【单选题】Which of the following is NOT a point you should remember in writing a memo?
A.
Be rude to your reader
B.
Be concise
C.
Come to the point first
D.
Be coherent.
查看完整题目与答案
【单选题】You are writing a memo to employees announcing the loss of free parking. Which of the following would be the best closing sentence in this bad-news memo to employees? ( )
A.
We understand your disappointment with this decision.
B.
If you would like to sign up for our ride-sharing program to save on parking expenses, please see the receptionist.
C.
We trust you will continue to do your best in spite of the present difficult situation.
D.
Thank you in advance for your cooperation.
查看完整题目与答案
【单选题】Which of the following is NOT a point you should remember in writing a memo?
A.
be rude to your reader
B.
be concise
C.
come to the point first
D.
be coherent
查看完整题目与答案
【单选题】外面剂能使混凝土拌合物在不增加水泥用量的条件下，改善拌合物的和易性和黏聚性，降低（ ）。
A.
保水性
B.
泌水性
C.
耐久性
D.
流动性
查看完整题目与答案
【判断题】理想电压源和理想电流源可以相互等效
A.
正确
B.
错误
查看完整题目与答案
【判断题】理想电压源和理想电流源不可以相互等效替换。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Before you begin to write your first memo, it is important to understand the differences between writing memos and writing essays. A few of the most important distinctions appear in the table below. A...
A.
the importance of memo writing
B.
specific purpose of a memo
C.
a few important distinctions between memos and essays
D.
the importance of understanding the differences between writing memos and　writing essays
查看完整题目与答案