As we know, too much ________ to Xrays can cause skin burns, cancer or other damage to the body.
#5051
A
contact
B
appeal
C
exposure
D
contribution
推荐题目
The little boy came riding full speed down the motorway on his bicycle. ______ it was!
#7032
A
What a dangerous scene
B
What dangerous a scene
C
How a dangerous scene
D
How dangerous the scene
----“Did you get _____ to the party?”----- “Yes, I replied to it this morning.”
#7035
A
an answer
B
an invitation
C
a question
D
a letter
Pine trees, of which there are almost one hundred ____, are found throughout the North Temperate Zone.
#6453
A
species
B
samples
C
specimens
D
Standards
Visitors were struck by the natural _________ here, which was beautiful beyond description.
#5668
A
resource
B
scenery
C
disaster
D
element
The Klondike was the_____ of one of the biggest gold rushes the world has ever known.
#6881
A
scene
B
view
C
event
D
landscape