27.What can be a suitable title for the te
A.Taking Pictures must be very Dangerous
B.A Grandma Floated out to the Sea on an leeberg
C.An Optimistic Family Who Love leeberg
D.The Licensed Boat Captain Went Hot Slowly
Here’s an idea whose time has come:A flu shot that doesn’t require an actual shot.
For the first time,researchers have tested a flu vaccine patch（疫苗贴）in a human clinical trial and found that it delivered as much protection as a traditional injection with a needle.Doctors and public health experts haye high hopes that it will increase the nuaher of people who get immunized against the flu.
Seasonal flu is responsible for up to half a million deaths around the led