读太阳黑子与温带乔木年轮相关性曲线图，此图所反映的问题是

A．太阳活动能影响地球气候

B．太阳活动发射的电磁波能扰动地球的电离层

C．太阳活动时，抛出的带电粒子流扰动地球磁场，产生“磁暴”现象

D．太阳活动时，太阳风使两极地区出现极光，从而影响中、高纬度地区树木的生长

. Inoculation(接种) of the H1N1 vaccine ___ launch another round to weak people in February,

but due to a global shortage, that has not happened yet.

A．was made to

B．was supposed to

C．was designed to

D．was hoped to