直流喷燃器为长矩形的组合体,其出口截面由一组()喷口组成。
A.多边形
B.圆形
C.椭圆形
D.矩形
参考答案:A, B, D
阅读下面的短文,判断下列句子正(T)误(F)。
I like school days, because I can learn (学习) many things from school. We have four classes in the
morning and two in the afternoon. I like weekends, too. We don't go to school on Saturdays and Sundays. I
often play ping-pong and play basketball on Saturday morning. I often play the violin (小提琴) on Saturday
afternoon. I often do homework and play football on Sunday morning. I often go to the park on Sunday
afternoon.
( ) 1. I go to school five days a week.
( ) 2. We have four classes everyday (每天).
( ) 3. I play the violin on Saturday afternoon.
( ) 4. I like Saturdays and Sundays.
( ) 5. I often do my homework, play football and go to the park on Sundays.
根据《公司债券发行试点办法》第二十七条规定,下列属于应当召开债券持有人会议情况的是()。
A.拟变更债券募集说明书的约定
B.拟变更债券受托管理人
C.公司不能按期支付本息
D.公司减资、合并、分立、解散或者申请破产