【判断题】提高空气(及煤气)的预热温度可以节约燃料。
【单选题】Which of the following about phonological items is RIGHT?
A.
All the phonological items are not isolated from each other, but are of the equal importance.
B.
Generally speaking, sounds are equal to letters.
C.
English consonants can be classified according to the manner of articulation.
D.
Fluency is the most essential measurement of pronunciation.
【简答题】从集合{1,2,3,4,5,6,7,8,9,10}中任选三个不同的数,如果这三个数经过适当的排列成等差数列,则这样的等差数列一共有 ( ) A 20个 B 40个 C 10个 D 120个
【判断题】一个快攻打法的选手同一个削攻打法的选手相配,常选用∞字形移动。
【单选题】已知数列{a n }是各项均为正整数的等比数列,数列{b n }是等差数列,且a 6 =b 7 ,则有( )
D.
a 3 +a 4 与b 1 +b 10 的大小关系不确定
【简答题】已知S n 是等比数列{a n }的前n项和,S 4 、S 10 、S 7 成等差数列. (I )求证而a 3 ,a 9 ,a 6 成等差数列; (II)若a 1 =1,求数列{a 3 n }的前n项的积
【单选题】等差数列-1,4,9,14, ,此等差数列的公差 =( )
【单选题】创意的(),就是要使广告传达的信息直达人的内心深处,唤起共鸣,而不是简单的对消费者说教,自说自话。