第7题: [单项选择]In proposing (such philanthropic donations), the director of the company certainly spoke (from) a-genuine concern (for the needy) and not (any desire) for personal accolades. A. such philanthropic donations B. from C. for the needy D. any desire 参考答案:D 答案解析:应改为any desires。
第30题: [单项选择]Diesel fuel is relatively safe to handle due to its low volatility, but the fumes will self-ignite and continue to burn steadily if the fuel is heated to the (). A. flash point B. auto-ignition point C. volatility point D. upper explosive limit 参考答案:B
第31题: [单项选择]关于胎盘的结构功能,下列哪项是不正确的()。 A. 胎盘是胚胎与母体组织的结构体 B. 胎盘有内分泌功能 C. 足月儿胎盘质量为450~650g D. 体积微小的病毒仍不能通过胎盘进入胎儿 E. 吗啡、巴比妥、抗生素可以通过胎盘 参考答案:D