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【单选题】
climate changeA.
气候变化
B.
天气变化
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皮皮学刷刷变学霸
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【简答题】液体中物料 i 浓度为200mg/L,经过2个串联的CSTR型反应器后, i 的浓度降至20mg/L。液体流量为5000m 3 /h;反应级数为1;速率常数为0.8h -1 。求每个反应器的体积和总反应时间。
【简答题】体中物料 i 浓度为 200mg/l, 经过两个串联的 CSTR 型反应器, i 浓度为 20mg/l 液体流量为 5000m3/h ,且属一级反应, k = 0.8h-1 ,求每个反应器的体积和总反应时间。
【单选题】The sign shows that _____________.
A.
You should be careful on the ice.
B.
You can go this way to get out.
C.
You should pay attention to your steps.
【多选题】一张标准的商务名片应包括( )。
A.
单位的全称、所在的部门、企业标志(CIS)
B.
姓名、职务、行政职务和职称等
C.
单位的具体业务、经营范围、相关领导
D.
地址、邮政编码、办公室电话，现代商务中有的时 候印电子邮箱、网址、微信号、二维码等也可以
【单选题】Which of the following is NOT a sign that shows the present situation of American's health care?
A.
The various health proposals.
B.
The various benefits it provides.
C.
The Massachusetts law by Mitt Romney.
D.
The increase of workers' monthly premiums.
【单选题】The last sentence in the passage shows that ______.
A.
Tommy felt sorry for the mail
B.
Tommy was afraid of being nailed
C.
Tommy didn’t like the plus sign
D.
Tommy liked playing jokes on others
【单选题】企业销售某种产品,价目表中的报价为10 000元,商业折扣为10%,付款条件为2/10、1/20、N/30,在总价法下,应收账款的入账金额为( )元。
A.
9 800
B.
9 000
C.
8 820
D.
8 800
【单选题】After falling off a tall balcony, a patient is brought to the ER. The patient is alert, reports back pain, and has difficulty moving the lower extremities. Which additional sign shows that the patient...
A.
Cool, pale skin
B.
Bradycardia
C.
Poor skin turgor
D.
Increased systolic blood pressure
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