单选题：The basic causes are unknown, although certain conditions th

  • 题目分类：专四
  • 题目类型：单选题
  • 号外号外：注册会员即送体验阅读点！
题目内容：
The basic causes are unknown, although certain conditions that may lead to cancer have been __________ A．identified
B．guaranteed
C．notified
D．conveyed

参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：

Hydrogen is the fundamental element of the universe ________

Hydrogen is the fundamental element of the universe __________it provides the b

分类：专四  题型：单选题
查看答案

请在第(47)处选择正确答案_______

请在第(47)处选择正确答案_______A．product B．production C．progress D．proceeding

分类：专四  题型：单选题
查看答案

请在第(36)处选择正确答案_______

请在第(36)处选择正确答案_______A．average B．normal C．standard D．routine

分类：专四  题型：单选题
查看答案

请在第(35)处选择正确答案_______

请在第(35)处选择正确答案_______A．as B．for C．than D．that

分类：专四  题型：单选题
查看答案