管道内检测器主要有基于超声波原理的检测器主要检测（）。 A.管道壁厚 B.防腐层破损

根据增值税法律制度的规定，下列各项中，属于一并缴纳增值税的混合销售行为的是（）。

A.某建材商店销售建材的同时负责送货上门

B.某汽车制造公司在销售汽车的同时为其他客户提供售后修理劳务

C.某电信局销售电话机的同时提供电信服务

D.某建筑单位提供建筑业劳务的同时销售自产的货物

人体内嘌呤核苷酸分解代谢的主要终产物是

A．磷酸盐

B．尿酸

C．肌酐

D．尿苷酸

E．尿素

Woman: I just can't believe this is our last year. College is going by fast.Man: Yeah, we'll have to face the real world soon. So have you figured out what you are going to do after you graduateQuestion: What do we learn from the conversation

A．The two speakers are at a loss what to do.

B．The man is worried about his future.

C．The two speakers are seniors at college.

D．The woman regrets spending her time idly.

足太阳原穴为( )

A．京骨
B．飞扬
C．申脉
D．足通谷

红十字会经费的主要来源是什么？