It is these poisonous products _____ can cause the symptoms of the flu, such as headaches and aching muscles.

A．who

B．that

C．how

D．what

妊娠对糖尿病的影响，正确的是()

A．孕期尿糖不能正确反映病情

B．不易发生酮症酸中毒

C．孕早期抗胰岛素分泌显著增多

D．孕中晚期抗胰岛素分泌正常

E．孕期糖耐量试验无明显变化