硝酸甘油为临床常用抗心绞痛药物，常与β受体阻断剂合用，其重要理由为

Some of the world's leading museums show Dyson vacuums.

A．Right

B．Wrong

C．Doesn't say

Some of the world's leading museums show Dyson vacuums.

A．right

B．wrong

C．Doesn't say

Analysts and political leaders won't show concern for______.

A．the global balance of power

B．the health of the planet

C．the poverty in the world

D．the competition for resources

A．15%

B．20%

C．25%

D．30%

Who can it be？ I' m quite______ a loss to guess.

A．of

B．on

C．in

D．at

I'm not good at math. This problem is quite______ me.

A．above

B．over

C．beyond

D．against

A．To show that those are the cause of their fight for the right to host the World Cup.

B．To show that the disputes are as important as the fight for the right to host the World Cup.

C．To show that the disputes are more important than the fight for the right to host the World Cup.

D．To show that the disputes are less important than the fight for the right to host the World Cup.

The author mentions big cities such as Tokyo, Singapore and Paris______.

A. to show that city people all over the world have a lot in common

B. to let his readers be aware that they are some of the world's biggest cities

C. to illustrate their difference from American cities

D. because they are some of the cities that attract visitors most

A．15%

B．20%

C．25%

D．30%