A. (A) One year. B. (B) Two years. C. (C) Three years. D. (D) Four years. 参考答案:B 答案解析:[听力原文]23-26
The World Health Organization says extraordinary progress has been made since the gl
第9题: [单项选择]急性乙型肝炎病毒感染的窗口期() A. HBsAg(-)抗HBs(+)HBeAg(-)抗-HBe(-)抗HBc(-) B. HBsAg(+)抗HBs(-)HBeAg(-)抗-HBe(-)抗HBc(+) C. HBsAg(-)抗HBs(-)HBeAg(-)抗-HBe(-)抗HBc(+) D. HBsAg(+)HBeAg(+)抗-HBc(+) E. HBsAg(+)抗-HBe(+)抗-HBc(+) 参考答案:C
第20题: [单项选择]函数MOD(4*7,-24/4)的值是( )。 A. 8 B. 4 C. -8 D. -4 参考答案:D 答案解析:[解析] MOD函数是求余函数,格式是:MOD(<数值表达式1>,<数值表达式2>)。功能是:返回两个数值相除后的余数。<数值表达式1>是被除数,<数值表达式2>是除数。余数的正负号与除数相同。如果被
第35题: [单项选择]People disagree because they look at the same problem from a different perspective. A. prospect B. vision C. method D. view 参考答案:D 答案解析:view:看法、见解和perspective(看法、观点)词义相近;prospect:前景、前途、景色、视野;vision:远见、眼光;method:方法、办法。