Hyperthyroidism is caused by increased levels of thyroxine in blood plasma. A client with this endocrine dysfunction would experience （）.

A．heat intolerance and systolic hypertension.

B．weight gain and heat intolerance.

C．diastolic hypertension and widened pulse pressure.

D．anorexia and hyperexcitability.

按照油品火灾危险性分类标准，轻、重柴油，20号重油属于( )。

A．乙类
B．甲类
C．丙B类
D．丙A类