【单选题】叶粉末经微量升华得油状物,加硫酸2滴及香草醛结晶少量,初显黄色至橙黄色,再加水1滴,即变紫红色,用该法鉴别的药材是
【单选题】The word 'serving' (in Paragraph 2) means '______'.
C.
working as a repairman
D.
working as a fisherman
【单选题】叶粉末经微量升华得油状物,加硫酸2滴及香草醛结晶少量,初显黄色至橙黄色,再加水1滴,即变紫红色,用该法鉴别的药材是( )
【单选题】With respect to program variables, (71) means assigning a beginning value to a variabl
【单选题】"Emergency Escape Breathing Device(EEBD)" means______
【单选题】To save ______ means you save money to use in an emergency.
B.
for a stormy afternoon