支气管哮喘最有意义的临床表现特点是

A．呈反复发作，持续不能缓解

B．呈发作性，可缓解

C．呈进行性加重

D．有肺气肿体征

E．有哮鸣音

Which of the following statements is not true().

A. East Timor is an island.

B. East Timor used to belong to Indonesia.

C. East Timor has a p economy because of its tourism development.

D. East Timor will not develop its tourism at the expense of its natural beauty.