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【简答题】
According to the anti -railway group, all the followings are true but ______. A) tunnels are dangerous to public health B) the noise and the glare of the engine fire may affect people' s nerves C) the rapid speed through the air does damage to people's lungs D) to those with high blood - pressure, the rapid speed of the train causes them to die
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举一反三
【单选题】有甜味的糖苷为（ ）A．人参皂苷B．甜菊苷C．黄芪皂苷 D．
A.
第 99 题 有甜味的糖苷为（ ） A．人参皂苷
B.
甜菊苷
C.
黄芪皂苷
D.
柴胡皂苷
E.
环烯醚萜苷