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【单选题】
属性选择器中,E[att=value]属性选择器,是选择:A.
名称为E的标记，且该标记定义了att属性，att属性值包含为后缀value的子字符串
B.
名称为E的标记，且该标记定义了att属性，att属性值包含前缀为value的子字符串
C.
名称为E的标记，且该标记定义了att属性，att属性值为value的字符串
D.
名称为E的标记，且该标记定义了att属性，att属性值包含为value的子字符串
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反馈参考答案：
举一反三
【单选题】Which of the following promises constitutes sufficient consideration in the formation of a contract?
A.
To reimburse the cost of refurbishing a house where the promise in made after the refurbishing has been completed
B.
To lease a house at an annual rent significantly below current market rates
C.
To pay a witness an agreed monetary sum in exchange for attending court
D.
To pay a worker extra remuneration in exchange of continuing to perform their existing contractual duties
【单选题】In the rostrocaudal patterning of nervours system, which of the following molecule plays a key role in the formation of MHB.
A.
Wnt
B.
BMP
C.
Shh
D.
FGF8
【单选题】Which of these results in the formation of a precipitate?
A.
AgNO 3 (aq) + NaOH (aq) -->
B.
BaNO 3 (aq) + CaCl 2 (aq) -->
C.
NaNO 3 (aq) + KOH (aq) -->
D.
more than one of these form precipitates
【单选题】以下哪项不属于电子商务的优点?( )
A.
降低了成本，突破了时空限制
B.
具有开放性和全球性特点
C.
减少了中间环节，生产者和消费者直接交易
D.
提高了知名企业的竞争能力
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