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【简答题】
滚子链传动的主要失效形式有链条 、 、铰链胶合和过载拉断。
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举一反三
【单选题】They usually have less money at the end of the month than they have at the beginning.
A.
他们通常月底比月初的时候钱少
B.
通常他们月初钱多 , 月末钱少
C.
通常他们月底有的钱比开始的时候少一些。
D.
他们通常结束的时候比开始的时候钱少一些
【单选题】After touring Canada, Ava is returning to the USA. She converts Can$1260 to dollars. How many dollars will she receive, supposes the exchange rate is USD/CAD=1.3200 ?
A.
1662
B.
1663
C.
954.5
D.
956.5
【简答题】(8分)判断含氧酸强弱的一条经验规律：含氧酸分子结构中含非羟基氧原子数越多，该含氧酸的酸性越强。几种实例如下表所示。 次氯酸 磷酸 硫酸 高氯酸 含氧酸 非羟基 氧原子数 0 1 2 3 酸性 弱酸 中强酸 强酸 最强酸 (1)亚磷酸(H 3 PO 3 )和亚砷酸(H 3 AsO 3 )的分子式相似，但它们的酸性差别很大。亚磷酸是中强酸，亚砷酸既有弱酸性又有弱碱性，由此可推出它们的结构式分别为： ...
【单选题】Your network consists of a single Active Directory domain. All computers on the network are joined to the domain. You have a server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2). Yo...
A.
Log on to Server1 as a local administrator. Create a shortcut to App1 in the Default User profile.
B.
Log on to Server1 as a local administrator. Create a shortcut to App1 in the All Users profile.
C.
In the Netlogon share on a domain controller, create a folder named Default User. Create a shortcut for App1 in the new folder.
D.
In the Netlogon share on a domain controller, create a folder named All Users. Create a shortcut for App1 in the new folder.
【单选题】New information about medicines
A.
is updated by the manufacturers twice a day.
B.
is made available to customers by AHL personnel.
C.
is given direct to customers by manufacturers.
【单选题】—“Could I see Doctor Huang tomorrow?” the patient asked. —“ ” the nurse said politely, “He is only available today since this evening he will fly to Boston for a three-day meeting.”
A.
Not likely.
B.
Not exactly.
C.
Not nearly.
D.
Not really.
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