当新凯越的自动变速箱被锁定而无法挂档操作时,以下哪种方式可以解锁()。
A. 将钥匙放入中央储物盒
B. 将钥匙插入点火插口
C. 将钥匙插入排挡杆上的小孔
D. 将钥匙放入手套箱
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Which two are true about aggregate functions?()
A. You can use aggregate functions in any clause of a SELECT statement.
B. You can use aggregate functions only in the column list of the select clause and in the WHERE clause of a SELECT statement.
C. You can mix single row columns with aggregate functions in the column list of a SELECT statement by grouping on the single row columns.
D. You can pass column names, expressions, constants, or functions as parameter to an aggregate function.
E. You can use aggregate functions on a table, only by grouping the whole table as one single group.
F. You cannot group the rows of a table by more than one column while using aggregate functions.
下列关于植物种子的描述,正确的是()
A. 双子叶植物的种子一般没有胚乳,整个种子是由受精卵发育来的
B. 单子叶植物和双子叶植物种子胚的结构完全相同
C. 种子萌发时胚根首先突破种皮向地生长,并发育成根
D. 种子萌发后依靠细胞分裂发育成幼苗