战略的基本特点是（）。A、全局性 B、对抗性 C、谋略性 D、预见性

肛管与直肠的连接处有一条不整齐的交界线，称为( )

A．肛管直肠环
B．齿状线
C．肛 * *
D．肛瓣
E．肌柱

Peter felt (感到) very sorry because he forgot (忘记) to say “Happy Birthday” to his uncle yesterday. So he wrote（写） a letter to his uncle : “My dear uncle, I’m very sorry because I forgot your birthday. But to teach me a lesson, you’d better (最好) forget my birthday on Tuesday, tomorrow.”

小题1: It was _________________  birthday last Sunday.

A. Peter’s       

B. Peter’s father’s 

C. Peter’s uncle’s

小题2: Peter said_________________ to his uncle in the letter.

A. sorry       B. goodbye      C. hello

小题3: “Teach me a lesson” here means “_______________ ”in Chinese.

A. 向我表示祝贺　B. 教我一招　C. 教训我一下

小题4: Peter wrote this letter on_____________________.

A．Monday

B．Tuesday

C．Saturday

D．Sunday小题5:Peter wrote this letter in order to (为了) ____________________.

A. forget his birthday            

B. forget his uncle’s birthday

C. let his uncle know Peter’s birthday

如图所示，实线表示两个相干波源S₁、S₂发出的波的波峰位置，则图中的______点为振动加强的位置，图中的______点为振动减弱的位置．

影响气化炉升温的因素有哪些？

为了提高液体燃料的燃烧速度，必须利用喷油嘴把它雾化成为很细的颗粒，增大其蒸发面积，这种过程通称为（）过程。